Conjugation of the verb "lengthen"
Conjugation of the verb lengthen[ˈleŋθən],
regular 
Indicative
Present Indefinite
Present Continuous
Present Perfect
Present Perfect Continuous
Past Indefinite
Past Continuous
Past Perfect
Past Perfect Continuous
Future Indefinite
Future Continuous
Future Perfect
Future Perfect Continuous
Indicative
Present Indefinite
I don't lengthenyou don't lengthen
he/she/it doesn't lengthen
we don't lengthen
you don't lengthen
they don't lengthen
Present Continuous
I am not lengtheningyou aren't lengthening
he/she/it isn't lengthening
we aren't lengthening
you aren't lengthening
they aren't lengthening
Present Perfect
I haven't lengthenedyou haven't lengthened
he/she/it hasn't lengthened
we haven't lengthened
you haven't lengthened
they haven't lengthened
Present Perfect Continuous
I haven't been lengtheningyou haven't been lengthening
he/she/it hasn't been lengthening
we haven't been lengthening
you haven't been lengthening
they haven't been lengthening
Past Indefinite
I didn't lengthenyou didn't lengthen
he/she/it didn't lengthen
we didn't lengthen
you didn't lengthen
they didn't lengthen
Past Continuous
I wasn't lengtheningyou weren't lengthening
he/she/it wasn't lengthening
we weren't lengthening
you weren't lengthening
they weren't lengthening
Past Perfect
I hadn't lengthenedyou hadn't lengthened
he/she/it hadn't lengthened
we hadn't lengthened
you hadn't lengthened
they hadn't lengthened
Past Perfect Continuous
I hadn't been lengtheningyou hadn't been lengthening
he/she/it hadn't been lengthening
we hadn't been lengthening
you hadn't been lengthening
they hadn't been lengthening
Future Indefinite
I shan't / won't lengthenyou won't lengthen
he/she/it won't lengthen
we shan't / won't lengthen
you won't lengthen
they won't lengthen
Future Continuous
I shan't / won't be lengtheningyou won't be lengthening
he/she/it won't be lengthening
we shan't / won't be lengthening
you won't be lengthening
they won't be lengthening
Future Perfect
I shan't / won't have lengthenedyou won't have lengthened
he/she/it won't have lengthened
we shan't / won't have lengthened
you won't have lengthened
they won't have lengthened
Future Perfect Continuous
I shan't / won't have been lengtheningyou won't have been lengthening
he/she/it won't have been lengthening
we shan't / won't have been lengthening
you won't have been lengthening
they won't have been lengthening
Conditional
Conditional Present
Conditional Present Continuous
Conditional Perfect
Conditional Perfect Continuous
Conditional
Conditional Present
I wouldn't lengthenyou wouldn't lengthen
he/she/it wouldn't lengthen
we wouldn't lengthen
you wouldn't lengthen
they wouldn't lengthen
Conditional Present Continuous
I wouldn't be lengtheningyou wouldn't be lengthening
he/she/it wouldn't be lengthening
we wouldn't be lengthening
you wouldn't be lengthening
they wouldn't be lengthening
Conditional Perfect
I wouldn't have lengthenedyou wouldn't have lengthened
he/she/it wouldn't have lengthened
we wouldn't have lengthened
you wouldn't have lengthened
they wouldn't have lengthened
Conditional Perfect Continuous
I wouldn't have been lengtheningyou wouldn't have been lengthening
he/she/it wouldn't have been lengthening
we wouldn't have been lengthening
you wouldn't have been lengthening
they wouldn't have been lengthening
Participles
Present
Past
Infinitives
Infinitives
Popular English Verbs
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